COOL STUFF
A
Jiya Stuff Contribution
A 
PRESENTATION
Optical Illusions
(SHOW YOUR CHILDREN)
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Red Dot
Stare at
the red dot long enough, and the grey stripes will disappear.
Also move
your head closer and farther from the screen and see the difference.
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Grey Lines
A convincing illusion.
Believe it or not, these lines are straight and parallel.
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Birds
The colors aren't what they seem in this
image.
The two
birds in this image are identical. Not just in size and shape, but in color
too.
Don't
believe us? Check out the same image with the background removed.
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Swimming
Here's a fishy illusion.
These
"fish" may appear to be wiggling, but the only thing changing in this
animation is the color.
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Arrows
Which color? Which direction?
What's your
first impression of this image? Yellow arrows pointing left, or green arrows
pointing right? There is no "correct" answer, but different people
perceive this image differently at first.
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Blue Spiral
More deceptive than it seems.
Another
"false spiral" -- actually a series of concentric circles, hard as it
may be to believe. To prove that there's no spiral, try tracing your finger
around one of the circles. You'll see that it never moves inward or outward.
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Red Balls
Afterimages in action.
Stare at
the center of this simple animation and you'll be convinced you're seeing a
green circle moving around the edge. But are you?
A still frame from the same animation reveals
that there is no green at all. Your eyes are perceiving a negative afterimage
of the magenta circles -- when they disappear, your photoreceptors compensate
by producing a ghost image of the opposite color (green).
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So Close, So Far
Get a little distance for this illusion.
Lean up
close to your monitor. What does this image say?
Try
stepping back a few feet. What does it say now?
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Chasm
This illusion lives on the edge.
What appears to be a gaping chasm in the middle of the
street...
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Wavy Lines?
Is the movement real or imagined?
Try moving your mouse pointer down across this
image, following the pointer closely with your eyes. You should see a rippling
effect moving through the picture -- even though it's a completely static
image!
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Cat
This one will have your head spinning.
A variation on a classic illusion, this cat can
be perceived as rotating in either direction. With practice, you can make it
switch at will!
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Spirals
A moving experience.
Believe it
or not, this image is not animated. The effect persists only in your peripheral
vision; if you focus on any one of the spirals, it will stop moving.
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Warp
Something's bent out of shape here.
More bang
for your buck! This three-in-one illusion includes a false spiral, an
impossible Escher-esque structure, and what appears to be a seriously warped
floor...
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Tangle
Can you spot the hidden word?
Can you unweave this web and find the hidden word within
it?
ANSWER: A little color-coding helps to reveal the truth.
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Sine Wave
A study in relative lengths.
Can you tell where on this curve the lines are the
longest, and where they are the shortest?
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Get a new
perspective in this puzzler.
Are the walls of this house facing outward, or inward?
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Dots in a Circle
Test your spatial perception.
Which of
these two dots is in the true center of the circle? Answer below.
ANSWER: With
the distracting lines out of the way, it's apparent that the green dot is at
the center.
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Cars
Scale and perspective.
Can you
tell which of these cars is the largest? Explained below.
Believe it
or not, the rightmost car is the largest. Our brain is wired to take
perspective into account, hence the common perception that the leftmost car is
larger.
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Checkers
Shed a little light on this problem.
Which
square is a lighter shade, A or B? Explained below:
ANSWER:
Taken out of context, you can see A and B are the same shade. Our familiarity
with light and shadow tricks us into thinking B is "actually" lighter
than A.
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Boxes
A classic illusion.
Here's a
simple one. Are these two rows of squares perfectly parallel? Explained below:
ANSWER: They
are indeed perfectly parallel, which becomes more apparent when the line
between them is highlighted.
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|
Mahjongg
Play
the ancient game of matching tiles! |
Mind
Impulse
Is
your brain agile enough to complete this mental obstacle course? |
|
Shape Inlay
Improve spatial recognition by sorting the shapes
before time runs out! |
Boggle
The classic word game comes to your computer! |
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